Method for preparing peroxysulfuric acid by sonoelectrochemical method

The invention discloses a method for preparing peroxysulfuric acid by a sonoelectrochemical method, which is characterized in that in the method, a sulphuric acid solution is placed in an electrolyzer; pure platinum serves as an anode, and a lead board or thermal shock graphite serves as a cathode; the cathode and the anode are separated by a sulfonic group anion selecting membrane; an ultrasonicis added at the bottom of the electrolyzer; the electrolysis temperature is 0-40 DEG C, and the electrolysis voltage is kept between 3V and 7V, and the current density is 1000A/m -6000A/m ; the frequency of the added ultrasonic is 20kHz-100kHz, the sound intensity of the ultrasonic is 5-20W/m , and the electrolysis time of the ultrasonic is 1-5 hours; and sulfate radicals in the sulphuric acid solution at the anode zone is subject to an oxidation reaction to produce the peroxysulfuric acid. Compared with the conventional method for preparing peroxysulfuric acid by the high concentrationsynthesis method, the invention has the advantages of simple method, reduced energy consumption, shortened reaction time, higher activity of a generated oxidant and the like.